[sanderjd]

That's very pedantic! While I didn't mean "it" in that statement to refer just to the word "lazy", I suppose it's true that "being lazy" also isn't technically a verb. Other commenters below have found more precise language, but I think a charitable reading of what I wrote is pretty clear in meaning.

[Digit-Al]

How about "stop [acting] lazy"? 'Acting' has more of an implication of something you are putting on that can be easily changed, rather than 'being' which possibly implies something you are, that is not easily changed.

[sanderjd]

This is deeper down a rabbit hole than I really meant to go, but I personally think "being lazy" is appropriate; I spend time being lazy pretty often, and it isn't an act, it's true laziness, but it's also temporary.